CN218028461U

CN218028461U - Restructured bamboo component node region structure

Info

Publication number: CN218028461U
Application number: CN202221167317.0U
Authority: CN
Inventors: 陈溪; 李向民; 冷予冰; 王卓琳; 许清风; 张富文
Original assignee: SHANGHAI JIANKE PRESTRESSED TECHNOLOGY ENGINEERING CO LTD; Shanghai Building Science Research Institute Co Ltd
Current assignee: SHANGHAI JIANKE PRESTRESSED TECHNOLOGY ENGINEERING CO LTD; Shanghai Building Science Research Institute Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-12-13
Anticipated expiration: 2032-05-16

Abstract

The utility model relates to a reorganization bamboo component node area structure, on arranging the basis that the bamboo restrainted along component axis direction, divide following condition optimization to arrange the bamboo bundle direction: for the unidirectional flexural member, in the connection node area of the recombined bamboo member, the combination of bamboo bundles orthogonally arranged or randomly arranged in the bending moment acting plane is included; for a bidirectionally curved member and/or a torsionally curved member, in the region of the connection nodes of the reconstituted bamboo member, a combination of bamboo strands arranged in a three-dimensional orthogonal manner is included.

Description

Restructured bamboo component node region structure

Technical Field

The utility model relates to a reorganization bamboo component node area structure belongs to engineering bamboo structural component preparation technical field.

Background

In recent years, abundant bamboo resources in China are gradually applied and paid attention to, and engineering bamboo represented by recombined bamboo is successfully applied to building engineering and becomes one of main directions of development of novel industrialized buildings. The node performance in the engineering bamboo structure building directly influences the whole safety performance of the structure, and is also the key point of the engineering bamboo structure design. In the connection of the engineering bamboo structure, the bolt connection is most widely applied due to the advantages of simple manufacture, safety, reliability, convenient construction and the like. The arrangement of the bamboo bundles is unidirectional when the recombined bamboo member is manufactured, so that the bending shear stress performance of the recombined bamboo member node is determined by the mechanical property of the node in the cross grain direction.

In order to improve the stress performance of the recombined bamboo member node, the conventional methods mainly comprise methods of improving the node structure, optimizing bolt arrangement, reinforcing an externally-wrapped steel plate and the like. The methods can improve the bearing capacity and the deformability of the node to a certain extent, but cannot effectively improve the brittle failure modes such as the bearing capacity of the pin groove of the recombined bamboo member node, the cross grain splitting and the like. In the manufacturing engineering of engineering bamboo components, how to improve the blank combination form of bamboo bundles will improve the mechanical properties of the recombined bamboo components in the cross grain direction is a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a reorganization bamboo component node region novel manufacturing method, arrange the bamboo bundle according to the node design load condition before the component veneer to improve the three-dimensional atress performance of component node, promote the application of engineering bamboo timber in the building.

The utility model adopts the following technical proposal:

a method for manufacturing a node area of a recombined bamboo member is characterized in that in a connection node area of the recombined bamboo member, the length of the connection node area along the axial direction of the member is 1-5 times the width of the member and can cover all areas of connecting pieces, and on the basis of arranging bamboo bundles along the axial direction of the member, the direction of the bamboo bundles is optimally arranged according to the following conditions: for the unidirectional flexural member, the bamboo bundles arranged in the connection node area are orthogonally arranged or randomly arranged in a bending moment action plane, and then are laminated and glued; for the bidirectional flexural member, the bamboo bundles arranged at the node areas are arranged in a three-dimensional orthogonal manner.

Preferably, the bamboo bundles in the other regions than the connection node region are all arranged along the axial direction of the member.

A restructured bamboo component node region structure optimizes the arrangement direction of bamboo bundles on the basis of arranging the bamboo bundles along the axial direction of a component according to the following conditions: for the unidirectional flexural member, in the connection node area of the recombined bamboo member, the combination of bamboo bundles orthogonally arranged or randomly arranged in the bending moment acting plane is included; for the bidirectionally curved member and/or the twist-curved member, in the connection node region of the recombined bamboo member, a combination of bamboo bundles arranged in a three-dimensional orthogonal manner is included.

Preferably, for the unidirectional flexural member, the combination of bamboo strands arranged in an orthogonal or random in-plane arrangement is glued layer by layer in a layered manner.

Preferably, the proportion of the total volume of the bamboo bundles in the optimized arrangement bamboo bundle direction to the total volume of the node area of the recombined bamboo member is 30-70%, and the bamboo bundles are uniformly distributed; correspondingly, the bamboo bundles arranged along the axial direction of the component account for 70-30% of the total volume of the node area of the recombined bamboo component and are also uniformly distributed.

Preferably, the bamboo bundles in the optimized bamboo bundle arrangement direction adopt bamboo bundles with circumscribed circle diameters not more than 2 mm.

Preferably, the high-performance reinforcing fibers are placed in the range of the bamboo bundles in the direction of the optimally arranged bamboo bundles.

Further, the high-performance reinforcing fiber is at least one of steel fiber and composite fiber.

The beneficial effects of the utility model reside in that: the novel manufacturing method for the node area of the recombined bamboo component is provided, the arrangement direction of bamboo bundles is optimized in the node area before the component is glued, the tensile capacity of cross grains in the node area is enhanced, the brittle failure of the node with split cross grains is avoided, and therefore the mechanical property of the recombined bamboo component node is improved.

Drawings

Fig. 1 is a top view of a bamboo bundle arrangement optimization structure in a node region plane of a reconstituted bamboo member. Wherein (a) is an in-plane orthogonal arrangement and (b) is an in-plane random arrangement.

Fig. 2 is a schematic diagram of a three-dimensional direction bamboo bundle arrangement optimization structure in a node area of a recombined bamboo member. Wherein (a) is a top view and (b) is a three-dimensional view.

In the figure, 1, axial bamboo filaments, 2, bamboo filaments orthogonally arranged in a plane, 3, bolt connection reserved holes, 4, bamboo filaments randomly arranged in the direction, 5, bamboo filaments arranged in a three-dimensional bird shape, 6, steel plate reserved grooves,

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, in a connection node area of a recombined bamboo member, in an area which is 1-5 times the width of the member along the axial direction of the member and can cover all connecting pieces, on the basis of arranging bamboo bundles along the axial direction of the member, the direction of the bamboo bundles is optimally arranged according to the following conditions:

for the unidirectional flexural member, the bamboo bundles arranged in the connection node area are orthogonally arranged or randomly arranged in a bending moment action plane, and then are laminated and glued; as shown in fig. 1.

For the bidirectional flexural member component, the bamboo bundles arranged in the node area are arranged in a three-dimensional orthogonal mode; as shown in fig. 2.

With continued reference to fig. 1-2, the bamboo strands in the areas other than the connection node areas are all arranged in the axial direction of the member, such as the axial bamboo filaments 1 in fig. 1 and 2.

Referring to fig. 1-2, a restructured bamboo member node region structure optimizes the arrangement of bamboo bundles in the following conditions on the basis of arranging the bamboo bundles in the member axis direction: for the unidirectional flexural member, in the connection node area of the recombined bamboo member, the combination of bamboo bundles orthogonally arranged or randomly arranged in the bending moment acting plane is included; for the bidirectionally curved member and/or the twist-curved member, in the connection node region of the recombined bamboo member, a combination of bamboo bundles arranged in a three-dimensional orthogonal manner is included.

In this embodiment, for the unidirectional flexural member, the combination of bamboo strands arranged in an orthogonal in-plane arrangement or in random directions are glued layer by layer in a layered fashion. This is not shown in detail in the figures.

In this embodiment, the proportion of the total volume of the bamboo bundles in the optimized arrangement bamboo bundle direction to the total volume of the node area of the recombined bamboo member is 30-70%, and the bamboo bundles are uniformly distributed; correspondingly, the bamboo bundles arranged along the axial direction of the member account for 70-30% of the total volume of the node area of the recombined bamboo member and are also uniformly distributed.

In this embodiment, the bamboo bundles in the optimized arrangement bamboo bundle direction adopt bamboo bundles with circumscribed circle diameter not more than 2 mm.

In this embodiment, within the range of the bamboo bundles in the optimized arrangement of the bamboo bundle direction, the high-performance reinforcing fiber is placed. The high-performance reinforced fiber is at least one of steel fiber and composite fiber.

A specific test example is shown below:

the recombined bamboo beam is under the action of unidirectional bending shear load in the structure, and the beam end is connected with the column by adopting an inserted steel plate bolt. Before the recombined bamboo beams are glued, firstly, bamboo bundles are arranged along the beam axial direction, the bamboo bundle arrangement direction is optimized within the range of 3 times of the beam width from the beam ends, and the inserted steel plates and the bolts are located in the optimized arrangement area. In the optimized arrangement area, only 50% of bamboo bundles arranged along the axial direction of the beam are reserved; the rest parts adopt bamboo bundles with circumscribed circle diameter not more than 2mm, and are uniformly arranged in the bending shear action plane according to the direction vertical to the beam axial direction. And gluing after the bamboo beams are arranged to form the recombined bamboo beam.

The utility model discloses arrange the direction through restrainting at the regional optimization bamboo of node before the component veneer, strengthen the regional striae tensile ability of node, avoid the node to appear the brittle failure of striae cleavage to the mechanical properties of reorganization bamboo component node has been improved.

The above are preferred embodiments of the present invention, and those skilled in the art can make various changes or improvements without departing from the general concept of the present invention, which should also fall within the scope of the protection claims.

Claims

1. The utility model provides a reorganization bamboo component node region structure which characterized in that:

on the basis of arranging the bamboo bundles along the axial direction of the component, the bamboo bundle direction is optimally arranged according to the following conditions:

for the unidirectional bending member, in the connection node area of the recombined bamboo member, the combination of bamboo bundles orthogonally arranged or randomly arranged in the bending moment action plane is included;

for the bidirectionally curved member and/or the twist-curved member, in the connection node region of the recombined bamboo member, a combination of bamboo bundles arranged in a three-dimensional orthogonal manner is included.

2. The reformed bamboo member node region structure of claim 1, wherein the combinations of bamboo strands arranged in an in-plane orthogonal arrangement or a random direction are laminated layer by layer for the unidirectional flexural member.

3. The joint area structure of a recombined bamboo member as claimed in claim 1, wherein the bamboo bundles with the optimized arrangement direction adopt bamboo bundles with circumscribed circle diameter not more than 2 mm.